Statement a is correct. Under the Government of India Act, 1935, the distribution of powers was done through three lists: Federal, Provincial, and Concurrent. Any matter not enumerated in these lists (residuary powers) was vested with the Governor-General of India. Statement b is correct. In the United States, the Tenth Amendment to the Constitution reserves powers not delegated to the federal government, nor prohibited to the states, to the States respectively, or the people. This is where residuary powers lie. Statement c is incorrect. In Canada, the residuary powers under its constitution (Constitution Act, 1867) are generally understood to be vested in the federal Parliament, which has the general power to make laws for the "Peace, Order, and good Government of Canada" on matters not exclusively assigned to the provincial legislatures.